| A | B | C | D | E | F | G | H | I | J | K | L | M | N |
| O | P | Q | R | S | T | U | V | W | X | Y | Z |
| O | P | Q | R | S | T | U | V | W | X | Y | Z |
| Label | Artyści | Debiut |
|---|---|---|
| Massacre Records | Atrocity | 1996 |
| Mastercult Records | Necrophobic | |
| Mastodon | Mastodon | 2001 |
| Matrix (5) | Abysal | 1998 |
| Maverick, Taste Media | Muse | 1999 |
| Mayan Records | Ministry | 2004 |
| Mazzar Records | Abigor | 2007 |
| MCA Records | Nirvana | 1996 |
| MCPS Ltd. | AC/DC | 2011 |
| Mechanic (2), Mechanic (2), MCA Records, Inc. | Dream Theater | 1989 |
| Mechanic Records, Mechanic Records | Dream Theater | 1989 |
| Media America | Alice In Chains | 1996 |
| mediacs AG | Manowar | 2002 |
| Mega Czad | Ahrimah | 1993 |
| Mega Metal Productions | Mortal Sin | 1997 |
| Mega Rabbit Recordings | Brutality | 2002 |
| Megadisc | Bill Laswell | 1984 |
| Megaforce Records | Anthrax | 1983 |
| Megaforce Worldwide | Anthrax | 1988 |
| Megaforce Worldwide, Atlantic | Overkill | 1990 |
| Megarock Records | Landberk | 1994 |
| Megaton Records (3) | Ulver | 2004 |
| Melancholia Records | Orakle | 2005 |
| Membran Music Ltd. | Tangerine Dream | 2010 |
| Membran Music Ltd., Documents | Tangerine Dream | 2009 |
